It's not. You can do the same with GPL-licensed code. You can use trademark law in both cases to prevent people from distributing modified versions, like Firefo

It's not. You can do the same with GPL-licensed code. You can use trademark law in both cases to prevent people from distributing modified versions, like Firefox did for years with Debian https://en.wikipedia.org/wiki/Debian–Mozilla_trademark_dispute https://en.wikipedia.org/wiki/Debian–Mozilla_trademark_dispu...